PORTLAND, Ore. (AP) — A same-sex couple in Oregon who tried to buy a cake for their wedding in January has filed a discrimination complaint against a bakery that turned them down on religious grounds.

The Oregonian reported (http://bit.ly/13A5MrI) on Wednesday that the state Bureau of Labor and Industries will investigate whether the business violated a 2007 state law that protects the rights of gays, lesbians, bisexual and transgender people in employment, housing and public accommodations.

The couple who operate Sweet Cakes by Melissa cited their Christian faith and right to religious freedom.

The state labor bureau says it’s the 10th complaint in five years of discrimination in a public place based on sexual orientation or gender identity.

The 2007 law provides an exemption for religious organizations and parochial schools but does not allow private business owners to discriminate based on sexual orientation.